[KK] Joan's timeline plugin's interpolables group function issue

[mrxuzhen]

When the studio was just opened ,everything seems to be normal, there are only some ui text error or something doesn't matter. I can group interpolables together and ungroup them with just some little problem, but it doesn't matter. But when the scene data is saved and loaded, everything became different, I can no longer ungroup them with "parent to nothing" but I have to move outer interpolables to the top of timeline.

here is the video when the bug happens:
https://mega.nz/file/RsVnRaaA#dMoDlaklacSTQScrvdfuFUYG_YBoKOm7YqO6VQ7wIoc
here is the log：
https://mega.nz/file/h9dGDTCT#zJLotKyIte3nSRDT7Nz4r3Fv5QBOOLi3RiVTQ8WB6V0

I only have a guess that the timeline will load the interpolables from the top to the bottom. If they scanned the keyframe and found there are 2 same interpolables, it will delete bottom one I think
So I must move up the outer interpolables to the top
whatever, It should be a bug anyway. Hope it can be fixed somehow.